Islamabad , Pakistan -LRB- CNN -RRB- -- The leader of the Taliban in Pakistan , Hakimullah Mehsud , was wounded in a suspected U.S. drone strike Thursday , intelligence and Taliban sources told CNN Friday .

A Taliban spokesman denied Thursday and again Friday that Mehsud was hurt . The spokesman , Azam Tariq , said Mehsud had left the site of the attack -- a converted religious school -- before the missiles struck . He dismissed reports of an injury to Mehsud as propaganda .

Other Taliban and intelligence sources , however , said doctors were treating Mehsud for wounds he sustained in the drone strike .

The drone attack killed 10 people , with four missiles landing near a madrassa , or religious school , Pakistani intelligence and local officials said Thursday . The school had been converted into a training camp for militants , the officials said .

Meanwhile Friday , another suspected drone strike killed five people in the village of Zarini , in North Waziristan , two intelligence sources said . No additional details were immediately available .

The U.S. military routinely offers no comment on reported attacks by drones , or unmanned aircraft . The United States is the only country operating in the region known to have the ability to launch missiles from remote-controlled aircraft .

The strike happened in the village of Pasal Kot . That 's in North Waziristan , part of Pakistan 's volatile tribal region that is the site of previous drone strikes and clashes between the Pakistani military and Islamic militants .

It comes a few days after Mehsud appeared in a video the Pakistani Taliban released . In it , he sits next to Humam Khalil Abu-Mulal al-Balawi , the man believed to be the suicide bomber who killed seven CIA employees and a Jordanian army captain at a base in eastern Afghanistan on December 30 .

The Pakistani Taliban claimed responsibility for that attack . It was carried out out to avenge the death of Mehsud 's predecessor , Baitullah Mehsud , who died in a suspected U.S. drone strike last year , according to al Qaeda 's commander of operations in Afghanistan , Mustafa Abu Yazid .

Baitullah Mehsud and Hakimullah Mehsud are from the same tribe , not from the same family .

In the video , al-Balawi said , `` We will never forget the blood of our leader Baitullah Mehsud , may God have mercy on his soul , '' according to a CNN translation .

`` It will remain that we take revenge -LRB- for his death -RRB- in America and outside America . It is a trust on every person who left everything for the sake of God , whom Baitullah Mehsud supported . ''

At one point , the video shows the date of December 20 , 2009 . That is five days before Nigerian passenger Umar Farouk AbdulMutallab allegedly tried to blow up a Northwest Airlines flight to Detroit , Michigan .

The Yemen-based group al Qaeda in the Arabian Peninsula has claimed responsibility for the Christmas Day plot .

It is impossible to know whether the date on the video is accurate , or whether al-Balawi was aware of AbdulMutallab 's alleged plans . If al-Balawi did know about the plot , it could indicate a greater degree of communication between the Pakistani Taliban and al Qaeda than previously thought .

Among the seven CIA employees who were killed in the December 30 attack were two members of the private security firm Xe , formerly known as Blackwater . The Jordanian military officer who was killed was Army Capt. Sharif Ali bin Zeid , a cousin of Jordan 's King Abdullah II . It was one of the worst attacks ever on America 's intelligence community .

Jordanian and U.S. intelligence agencies apparently believed al-Balawi had been rehabilitated from his extremist views and were using him to hunt Ayman al-Zawahiri , al Qaeda 's No. 2 figure , a former U.S. intelligence official said .

Al-Balawi was a Jordanian doctor whom Jordanian authorities had recruited as a counterterrorism intelligence source , a Jordanian official told CNN .

He said the video that his faith can not be sold to bidders , an apparent message to Jordanian and U.S. officials that they had failed to win his allegiance . It puts into question how well the CIA and other intelligence agencies can penetrate al Qaeda .

Journalist Nasir Dawar contributed to this report

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Mehsud moved to safe area for medical treatment , Taliban source says

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Mehsud appeared in a video released Saturday by Pakistani Taliban

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He was pictured next to suicide bomber who killed seven CIA employees

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Five dead in another suspected drone strike in North Waziristan